Device for attaching window-shades to rollers.



PATENTEU AUG. 2, 1904.

W. D. JANES.

DEVICE FOR ATTAGHING WINDOW SHADES TO ROLLERS.

APPLICATION FILED MAR.19,1904.

N0 MODEL.

WUNESSES:

7M5. @u/ow ATTORNEY No. 766,257. Patented August 2, 1904.

UNITED STATES PATENT OFFICE.

WVILLIAH D. JANES, OF SAGINAW', MICHIGAN, ASSIGNOR TO TH E QUAKER SHADEROLLER COh IPANY, OF BAY CITY, WICI'IIGAN.

DEVICE FOR ATTACHING WINDOW-SHADES TO ROLLERS.

SPECIFICATION forming part of Letters Patent NO. 766,257, dated August2, 1904.

Application filed March 19, 1904:. Serial No. 198,953. (No model.)

To 1077/ 775 W come these defects, make the plate more easily 5 Be itknown that I, \VILLIAu D. JANES, a applied to the roller, and toincrease its holdcitizen of the United States, residing at Sagiingpower, I have devised theimproved fastennaw, in the county of Saginawand State of ing shown in the accompanying drawings, hlichigan, haveinvented certain new and useforming a part of this specification.

ful Improvements in Devices for Attaching Figure 1 is a side view of agrooved roller 55 lVindow-Shades to Rollers; and I do hereby with theshade in place, one end of the shade declare the following to he a full,clear, and being turned back to show the groove and my exact descriptionof the invention, such as fastening device applied ready for driving. IOwill enable others skilled in the art to which Fig. 2 is an end view ofthe same. Fig. 3 is it appertains to make and use the same. an end viewshowing the fastening device 60 This invention is a device for attachingwinpressed in place ready to be flattened by drivdow-shades to rollers,and relates more paring. Fig. 1 is a side view of ashade fastenedticularly to that class of such devicesin which to its roller. Fig. 5 isan end view of the the roller is longitudinally grooved and the partsshown in Fig. 4. Fig. 6 is an enlarged end of the shade is fixed in thegroove by perspective of the fastening device ready to 5 means of smallbowed plates of sheet metal be driven. Fig. 7 is a similar view showinghaving teeth or prongs formed on their lonthe device forced into place.Fig. 8 is a pergitudinal edges engaging the walls of the spective of amodified form of my improve- 2o groove to fasten the shade in the grooveby ment.

spreading outand embeddmgmits walls when In the drawings, R representsthe roller, 7

the bowed plate is flattened or its curvature provided with the groove(ar, to which the reduced by driving. It will be noted that this shadeis attached by means of my improved class of fastening operates byflattening the fastening device, which consists, as above debowed plate,thus spreading its longitudinal scribed, in the usual bowed plate 1,having edges and forcing the teeth downwardly and outwardly-extendingteeth or prongs 2 2, 75 outwardly in opposite directions. Inflattenadapted to enter the walls of the groove Gr ing the plate it isof course necessary to bend when the plate 1 is flattened, as shown inFigs. the metal. During the flattening of the plate 5 and 7.

while the teeth are entering the opposite walls The main object of thisinvention is to inof the groove the resistance of the two walls surethat the oppositely-disposed prongs 2 2' 30 must be substantially equal,else the teeth will shall enter the walls equally. This is accomnotenter the opposite walls equally. plished by providing the bowed plate 1near It is found in practice that unless considerits middle with one ormore downwardly-exable care is taken to accurately adjust the tendingprongs 3, adapted to drive straight prongs of the grooved platerelatively to the into the face of the groove (l, and thus guide 5groove of the roller and unless the driving the middle part of the plate1 straight down force is applied directly above the center of to themiddle of the groove (1 so that the opthe plate the prongs on one sidewill go deeper posing prongs 2 2 as they straighten out un- 4 into thewalls of the groove than those on the der the driving force will enterequally the other side, often resulting in failure to grip oppositewalls of the groove G instead of en- 9 on one side and reducing ordestroying the' tering them unequally, as was frequently the holdingpower of the plate. 1f driven over case before the prongs 3 were used.on the shade side too far, the full width of the The prongs 3 may belixed to the concave plate cuts through the shade, and the shade is sideof the plate 1 in any suitable manner; but

apt to tear out at that point. Also if driven when the prongs 3 areformed as shown in 9.5 7 over too far to one side the prongs go clearthe drawings by slitting the plate 1 and bendthrough into the bore ofthe roller and intering the prongs 3 down, as shown in Figs. 6 fere withthe action of the spring. To overand 8, an additional advantage isattained.

This is evident when it is remembered that the prongs 2 2 are forcedoutwardly by the act of straightening or flattening the plate 1. Thegreatest bending occurs in the middle of the plate, and if the plate ismade of sheet metal having considerable elasticity it has a tendency tobow up or loosen after being driven and also by its resistance tostraightening while being driven tends to tear the wood and make holesin the walls of the groove Gr larger than the prongs 2 2, thus reducingits grip on the roller.

' By forming the prongs 3 from the body of the plate 1, as shown inFigs. 6 and 8, the cross-section of middle portion of the plate isreduced, permitting the plate 1 to flatten easier while being driven andallowing the prongs 2 2 to follow their natural tendency to enterstraight into the walls of the groove, thus making holes in the rollerof the same size as the prongs and greatly increasing their holdingpower. The reduced weakened crosssection of the plate 1 can exert lesstendency to bow up after being driven, and the prong 3 furthermoreoperates as a nail or spike to that the farm, number, and location ofthese prongs may be varied to some extent without departing from thespirit of my invention, which resides, essentially, in the guidingprongadapted to direct the body of the plate fair down upon the groove, whilethe prongs 2 2 spread out in opposite directions and enter the walls ofthe groove under the bending action of the plate 1 as it flattens whilebeing forced down upon the shade.

What I claim as my invention, and desire to secure by Letters Patent, isas follows:

1. In combination with a bowed plate having opposite edges provided withoutwardlyprojecting teeth adapted to enter the opposite walls of alongitudinal groove in a shaderoller when the plate is flattened; meansfor guiding the middle portion of the plate during the flatteningaction, comprising an inwardly-projecting prong fixed to the under sideof said bowed plate, for the purposes set forth.

2. In combination with a bowed plate having opposite edges provided withoutwardlyprojecting teeth adapted to enter the opposite walls of alongitudinal groove in a shade-roller when the plate is flattened; meansfor guiding the middle portion of the plate during the flatteningaction,comprising an inwardly-projecting member formed by slitting theplate to form a prong and bending in the prong so formed.

' In testimony whereof I affix my signature in presence of twowitnesses. 1

WILLIAM D. J ANES.

Witnesses:

W. I. CATHOART, A. O. EASTERLY

